Sarah McLachlan and Jewel cancelled their performances at a documentary premiere on Sunday to stand in support of free speech. The Canadian singer-songwriter attended the premiere of the ABC News Studios documentary Lilith Fair: Building a Mystery, about the travelling music festival she co-founded in the '90s, in Los Angeles. In an introductory speech before the film, McLachlan announced that she would not be performing to take a stand for free speech. However, sources told the publication that McLachlan and Jewel were set to take to the stage alongside a surprise guest. Lilith Fair: Building a Mystery was made by ABC News Studios, which is owned by Disney.